Datasheet

71M6541D/F/G and 71M6542F/G Data Sheet
Rev 4
Table 30: The T2CON Bit Functions (SFR 0xC8)
Bit
Symbol
Function
T2CON[7]
–
Not used.
T2CON[6]
I3FR
Polarity control for external interrupt 3: CE_BUSY
0 = falling edge.
1 = rising edge.
T2CON[5]
I2FR
Polarity control for external interrupt 2:
XPULSE, YPULSE, WPULSE and VPULSE
0 = falling edge.
1 = rising edge.
T2CON[4:0]
–
Not used.
Table 31: The IRCON Bit Functions (SFR 0xC0)
Bit
Symbol
Function
IRCON[7]
–
Not used
IRCON[6]
–
Not used
IRCON[5]
IEX6
1 = External interrupt 6 flag:
XFER_BUSY, RTC_1S, RTC_1M or RTC_T
IRCON[4]
IEX5
1 = External interrupt 5 flag:
EEPROM or SPI
IRCON[3]
IEX4
1 = External interrupt 4 flag:
VSTAT
IRCON[2]
IEX3
1 = External interrupt 3 flag:
CE_BUSY
IRCON[1]
IEX2
1 = External interrupt 2 flag:
XPULSE, YPULSE, WPULSE or VPULSE
IRCON[0]
–
Not used.
TF0 and TF1 (Timer 0 and Timer 1 overflow flags) are automatically cleared by hardware when
the service routine is called (Signals T0ACK and T1ACK – port ISR – active high when the
service routine is called). IE0, IE1 and IEX2-IEX6 are cleared automatically when hardware
causes execution to vector to the interrupt service routine.